We each have a little Neanderthal inside us, it's part of being human. When we need to drive mammoths off cliffs during snow storms it's there to help us. It makes us robust, providing stamina and endurance of pain.
For some boys and men as they come out of puberty and into maturity it provides a thick coat of hair on their chests and other places.

if you've got it flaunt it, don't be ashamed of showing your chest while wearing your speedos. If you are smooth enjoy your youthful good looks while you can and wear your speedos with pride.

If you intend to enter serious swimming races you'll have to shave your body as it will slow you down but not as much as wearing big baggy shorts would. Some swimming clubs have shaving parties where they have nibbles, drinks and shave each others bodies together. if you are lucky you may find such events recorded on You Tube.

Not sure what the problem is? All men swim without a top on so it doesn't matter. More of a problem is leg hair. I think that's why many wear long shorts. I'm not sure if I'd wear a speedo if I had leg hair.

Like most body hair, it really is a matter of personal preference. I tend to shave almost everything below the bridge of my nose. If you prefer to be natural, be natural. And there are plenty of points in-between. Speedos are for everyone

Would be the same to ask would you prefer to be a ant.....body hair comes as nature intended via parents dna of course, there's no benefit to either except if you are a competitive swimmer then there's less to do, my body hair is obvious but not OT and thankfully don't suffer the hairy back issue some do..;